Combination pipe and transmission adaptor unit



FIG. 1 is a rear elevational view of a combination pipe and transmission adaptor unit showing my new design;

FIG. 2 is a front elevational view on an enlarged scale;

FIG. 3 is a right side elevational view;

FIG. 4 is a top plan view; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a combination pipe and transmission adaptor unit, as shown and described. 